I say buying Bitcoin is legal, but depending on the place of the person who buys it, it will be marked as legal and illegal. In many countries, buying Bitcoin is illegal because that country does not support Bitcoin. But in the country where I live, if you use Bitcoin in this country and the government of the country finds out, then you can definitely put me in jail, we are secretly using Bitcoin.
But in all the countries where Bitcoin is legal, they are using Bitcoin safely, they are openly buying goods and services with Bitcoin. And many people are holding Bitcoin for a long time.